1 // SPDX-License-Identifier: GPL-2.0-only
3 * Copyright (c) 2015, The Linux Foundation. All rights reserved.
6 #include "drm/drm_bridge_connector.h"
11 #define DSI_CLOCK_MASTER DSI_0
12 #define DSI_CLOCK_SLAVE DSI_1
14 #define DSI_LEFT DSI_0
15 #define DSI_RIGHT DSI_1
17 /* According to the current drm framework sequence, take the encoder of
18 * DSI_1 as master encoder
20 #define DSI_ENCODER_MASTER DSI_1
21 #define DSI_ENCODER_SLAVE DSI_0
23 struct msm_dsi_manager {
24 struct msm_dsi *dsi[DSI_MAX];
28 int master_dsi_link_id;
31 static struct msm_dsi_manager msm_dsim_glb;
33 #define IS_BONDED_DSI() (msm_dsim_glb.is_bonded_dsi)
34 #define IS_SYNC_NEEDED() (msm_dsim_glb.is_sync_needed)
35 #define IS_MASTER_DSI_LINK(id) (msm_dsim_glb.master_dsi_link_id == id)
37 static inline struct msm_dsi *dsi_mgr_get_dsi(int id)
39 return msm_dsim_glb.dsi[id];
42 static inline struct msm_dsi *dsi_mgr_get_other_dsi(int id)
44 return msm_dsim_glb.dsi[(id + 1) % DSI_MAX];
47 static int dsi_mgr_parse_of(struct device_node *np, int id)
49 struct msm_dsi_manager *msm_dsim = &msm_dsim_glb;
51 /* We assume 2 dsi nodes have the same information of bonded dsi and
52 * sync-mode, and only one node specifies master in case of bonded mode.
54 if (!msm_dsim->is_bonded_dsi)
55 msm_dsim->is_bonded_dsi = of_property_read_bool(np, "qcom,dual-dsi-mode");
57 if (msm_dsim->is_bonded_dsi) {
58 if (of_property_read_bool(np, "qcom,master-dsi"))
59 msm_dsim->master_dsi_link_id = id;
60 if (!msm_dsim->is_sync_needed)
61 msm_dsim->is_sync_needed = of_property_read_bool(
62 np, "qcom,sync-dual-dsi");
68 static int dsi_mgr_setup_components(int id)
70 struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id);
71 struct msm_dsi *other_dsi = dsi_mgr_get_other_dsi(id);
72 struct msm_dsi *clk_master_dsi = dsi_mgr_get_dsi(DSI_CLOCK_MASTER);
73 struct msm_dsi *clk_slave_dsi = dsi_mgr_get_dsi(DSI_CLOCK_SLAVE);
76 if (!IS_BONDED_DSI()) {
77 ret = msm_dsi_host_register(msm_dsi->host);
81 msm_dsi_phy_set_usecase(msm_dsi->phy, MSM_DSI_PHY_STANDALONE);
82 msm_dsi_host_set_phy_mode(msm_dsi->host, msm_dsi->phy);
83 } else if (other_dsi) {
84 struct msm_dsi *master_link_dsi = IS_MASTER_DSI_LINK(id) ?
86 struct msm_dsi *slave_link_dsi = IS_MASTER_DSI_LINK(id) ?
88 /* Register slave host first, so that slave DSI device
89 * has a chance to probe, and do not block the master
91 * Also, do not check defer for the slave host,
92 * because only master DSI device adds the panel to global
93 * panel list. The panel's device is the master DSI device.
95 ret = msm_dsi_host_register(slave_link_dsi->host);
98 ret = msm_dsi_host_register(master_link_dsi->host);
102 /* PLL0 is to drive both 2 DSI link clocks in bonded DSI mode. */
103 msm_dsi_phy_set_usecase(clk_master_dsi->phy,
105 msm_dsi_phy_set_usecase(clk_slave_dsi->phy,
107 msm_dsi_host_set_phy_mode(msm_dsi->host, msm_dsi->phy);
108 msm_dsi_host_set_phy_mode(other_dsi->host, other_dsi->phy);
114 static int enable_phy(struct msm_dsi *msm_dsi,
115 struct msm_dsi_phy_shared_timings *shared_timings)
117 struct msm_dsi_phy_clk_request clk_req;
118 bool is_bonded_dsi = IS_BONDED_DSI();
120 msm_dsi_host_get_phy_clk_req(msm_dsi->host, &clk_req, is_bonded_dsi);
122 return msm_dsi_phy_enable(msm_dsi->phy, &clk_req, shared_timings);
126 dsi_mgr_phy_enable(int id,
127 struct msm_dsi_phy_shared_timings shared_timings[DSI_MAX])
129 struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id);
130 struct msm_dsi *mdsi = dsi_mgr_get_dsi(DSI_CLOCK_MASTER);
131 struct msm_dsi *sdsi = dsi_mgr_get_dsi(DSI_CLOCK_SLAVE);
134 /* In case of bonded DSI, some registers in PHY1 have been programmed
135 * during PLL0 clock's set_rate. The PHY1 reset called by host1 here
136 * will silently reset those PHY1 registers. Therefore we need to reset
137 * and enable both PHYs before any PLL clock operation.
139 if (IS_BONDED_DSI() && mdsi && sdsi) {
140 if (!mdsi->phy_enabled && !sdsi->phy_enabled) {
141 msm_dsi_host_reset_phy(mdsi->host);
142 msm_dsi_host_reset_phy(sdsi->host);
144 ret = enable_phy(mdsi,
145 &shared_timings[DSI_CLOCK_MASTER]);
148 ret = enable_phy(sdsi,
149 &shared_timings[DSI_CLOCK_SLAVE]);
151 msm_dsi_phy_disable(mdsi->phy);
156 msm_dsi_host_reset_phy(msm_dsi->host);
157 ret = enable_phy(msm_dsi, &shared_timings[id]);
162 msm_dsi->phy_enabled = true;
167 static void dsi_mgr_phy_disable(int id)
169 struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id);
170 struct msm_dsi *mdsi = dsi_mgr_get_dsi(DSI_CLOCK_MASTER);
171 struct msm_dsi *sdsi = dsi_mgr_get_dsi(DSI_CLOCK_SLAVE);
174 * In bonded dsi configuration, the phy should be disabled for the
175 * first controller only when the second controller is disabled.
177 msm_dsi->phy_enabled = false;
178 if (IS_BONDED_DSI() && mdsi && sdsi) {
179 if (!mdsi->phy_enabled && !sdsi->phy_enabled) {
180 msm_dsi_phy_disable(sdsi->phy);
181 msm_dsi_phy_disable(mdsi->phy);
184 msm_dsi_phy_disable(msm_dsi->phy);
189 struct drm_bridge base;
193 #define to_dsi_bridge(x) container_of(x, struct dsi_bridge, base)
195 static int dsi_mgr_bridge_get_id(struct drm_bridge *bridge)
197 struct dsi_bridge *dsi_bridge = to_dsi_bridge(bridge);
198 return dsi_bridge->id;
201 static void msm_dsi_manager_set_split_display(u8 id)
203 struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id);
204 struct msm_dsi *other_dsi = dsi_mgr_get_other_dsi(id);
205 struct msm_drm_private *priv = msm_dsi->dev->dev_private;
206 struct msm_kms *kms = priv->kms;
207 struct msm_dsi *master_dsi, *slave_dsi;
209 if (IS_BONDED_DSI() && !IS_MASTER_DSI_LINK(id)) {
210 master_dsi = other_dsi;
213 master_dsi = msm_dsi;
214 slave_dsi = other_dsi;
217 if (!msm_dsi->external_bridge || !IS_BONDED_DSI())
221 * Set split display info to kms once bonded DSI panel is connected to
224 if (other_dsi && other_dsi->external_bridge && kms->funcs->set_split_display) {
225 kms->funcs->set_split_display(kms, master_dsi->encoder,
227 msm_dsi_is_cmd_mode(msm_dsi));
231 static int dsi_mgr_bridge_power_on(struct drm_bridge *bridge)
233 int id = dsi_mgr_bridge_get_id(bridge);
234 struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id);
235 struct msm_dsi *msm_dsi1 = dsi_mgr_get_dsi(DSI_1);
236 struct mipi_dsi_host *host = msm_dsi->host;
237 struct msm_dsi_phy_shared_timings phy_shared_timings[DSI_MAX];
238 bool is_bonded_dsi = IS_BONDED_DSI();
243 ret = dsi_mgr_phy_enable(id, phy_shared_timings);
247 ret = msm_dsi_host_power_on(host, &phy_shared_timings[id], is_bonded_dsi, msm_dsi->phy);
249 pr_err("%s: power on host %d failed, %d\n", __func__, id, ret);
253 if (is_bonded_dsi && msm_dsi1) {
254 ret = msm_dsi_host_power_on(msm_dsi1->host,
255 &phy_shared_timings[DSI_1], is_bonded_dsi, msm_dsi1->phy);
257 pr_err("%s: power on host1 failed, %d\n",
264 * Enable before preparing the panel, disable after unpreparing, so
265 * that the panel can communicate over the DSI link.
267 msm_dsi_host_enable_irq(host);
268 if (is_bonded_dsi && msm_dsi1)
269 msm_dsi_host_enable_irq(msm_dsi1->host);
274 msm_dsi_host_power_off(host);
276 dsi_mgr_phy_disable(id);
281 static void dsi_mgr_bridge_power_off(struct drm_bridge *bridge)
283 int id = dsi_mgr_bridge_get_id(bridge);
284 struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id);
285 struct msm_dsi *msm_dsi1 = dsi_mgr_get_dsi(DSI_1);
286 struct mipi_dsi_host *host = msm_dsi->host;
287 bool is_bonded_dsi = IS_BONDED_DSI();
289 msm_dsi_host_disable_irq(host);
290 if (is_bonded_dsi && msm_dsi1) {
291 msm_dsi_host_disable_irq(msm_dsi1->host);
292 msm_dsi_host_power_off(msm_dsi1->host);
294 msm_dsi_host_power_off(host);
295 dsi_mgr_phy_disable(id);
298 static void dsi_mgr_bridge_pre_enable(struct drm_bridge *bridge)
300 int id = dsi_mgr_bridge_get_id(bridge);
301 struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id);
302 struct msm_dsi *msm_dsi1 = dsi_mgr_get_dsi(DSI_1);
303 struct mipi_dsi_host *host = msm_dsi->host;
304 bool is_bonded_dsi = IS_BONDED_DSI();
308 if (!msm_dsi_device_connected(msm_dsi))
311 /* Do nothing with the host if it is slave-DSI in case of bonded DSI */
312 if (is_bonded_dsi && !IS_MASTER_DSI_LINK(id))
315 ret = dsi_mgr_bridge_power_on(bridge);
317 dev_err(&msm_dsi->pdev->dev, "Power on failed: %d\n", ret);
321 ret = msm_dsi_host_enable(host);
323 pr_err("%s: enable host %d failed, %d\n", __func__, id, ret);
327 if (is_bonded_dsi && msm_dsi1) {
328 ret = msm_dsi_host_enable(msm_dsi1->host);
330 pr_err("%s: enable host1 failed, %d\n", __func__, ret);
338 msm_dsi_host_disable(host);
340 dsi_mgr_bridge_power_off(bridge);
343 void msm_dsi_manager_tpg_enable(void)
345 struct msm_dsi *m_dsi = dsi_mgr_get_dsi(DSI_0);
346 struct msm_dsi *s_dsi = dsi_mgr_get_dsi(DSI_1);
348 /* if dual dsi, trigger tpg on master first then slave */
350 msm_dsi_host_test_pattern_en(m_dsi->host);
351 if (IS_BONDED_DSI() && s_dsi)
352 msm_dsi_host_test_pattern_en(s_dsi->host);
356 static void dsi_mgr_bridge_post_disable(struct drm_bridge *bridge)
358 int id = dsi_mgr_bridge_get_id(bridge);
359 struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id);
360 struct msm_dsi *msm_dsi1 = dsi_mgr_get_dsi(DSI_1);
361 struct mipi_dsi_host *host = msm_dsi->host;
362 bool is_bonded_dsi = IS_BONDED_DSI();
367 if (!msm_dsi_device_connected(msm_dsi))
371 * Do nothing with the host if it is slave-DSI in case of bonded DSI.
372 * It is safe to call dsi_mgr_phy_disable() here because a single PHY
373 * won't be diabled until both PHYs request disable.
375 if (is_bonded_dsi && !IS_MASTER_DSI_LINK(id))
378 ret = msm_dsi_host_disable(host);
380 pr_err("%s: host %d disable failed, %d\n", __func__, id, ret);
382 if (is_bonded_dsi && msm_dsi1) {
383 ret = msm_dsi_host_disable(msm_dsi1->host);
385 pr_err("%s: host1 disable failed, %d\n", __func__, ret);
388 msm_dsi_host_disable_irq(host);
389 if (is_bonded_dsi && msm_dsi1)
390 msm_dsi_host_disable_irq(msm_dsi1->host);
392 /* Save PHY status if it is a clock source */
393 msm_dsi_phy_pll_save_state(msm_dsi->phy);
395 ret = msm_dsi_host_power_off(host);
397 pr_err("%s: host %d power off failed,%d\n", __func__, id, ret);
399 if (is_bonded_dsi && msm_dsi1) {
400 ret = msm_dsi_host_power_off(msm_dsi1->host);
402 pr_err("%s: host1 power off failed, %d\n",
407 dsi_mgr_phy_disable(id);
410 static void dsi_mgr_bridge_mode_set(struct drm_bridge *bridge,
411 const struct drm_display_mode *mode,
412 const struct drm_display_mode *adjusted_mode)
414 int id = dsi_mgr_bridge_get_id(bridge);
415 struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id);
416 struct msm_dsi *other_dsi = dsi_mgr_get_other_dsi(id);
417 struct mipi_dsi_host *host = msm_dsi->host;
418 bool is_bonded_dsi = IS_BONDED_DSI();
420 DBG("set mode: " DRM_MODE_FMT, DRM_MODE_ARG(mode));
422 if (is_bonded_dsi && !IS_MASTER_DSI_LINK(id))
425 msm_dsi_host_set_display_mode(host, adjusted_mode);
426 if (is_bonded_dsi && other_dsi)
427 msm_dsi_host_set_display_mode(other_dsi->host, adjusted_mode);
430 static enum drm_mode_status dsi_mgr_bridge_mode_valid(struct drm_bridge *bridge,
431 const struct drm_display_info *info,
432 const struct drm_display_mode *mode)
434 int id = dsi_mgr_bridge_get_id(bridge);
435 struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id);
436 struct mipi_dsi_host *host = msm_dsi->host;
437 struct platform_device *pdev = msm_dsi->pdev;
438 struct dev_pm_opp *opp;
439 unsigned long byte_clk_rate;
441 byte_clk_rate = dsi_byte_clk_get_rate(host, IS_BONDED_DSI(), mode);
443 opp = dev_pm_opp_find_freq_ceil(&pdev->dev, &byte_clk_rate);
446 } else if (PTR_ERR(opp) == -ERANGE) {
448 * An empty table is created by devm_pm_opp_set_clkname() even
449 * if there is none. Thus find_freq_ceil will still return
450 * -ERANGE in such case.
452 if (dev_pm_opp_get_opp_count(&pdev->dev) != 0)
453 return MODE_CLOCK_RANGE;
458 return msm_dsi_host_check_dsc(host, mode);
461 static const struct drm_bridge_funcs dsi_mgr_bridge_funcs = {
462 .pre_enable = dsi_mgr_bridge_pre_enable,
463 .post_disable = dsi_mgr_bridge_post_disable,
464 .mode_set = dsi_mgr_bridge_mode_set,
465 .mode_valid = dsi_mgr_bridge_mode_valid,
468 /* initialize bridge */
469 int msm_dsi_manager_bridge_init(struct msm_dsi *msm_dsi)
471 struct drm_bridge *bridge = NULL;
472 struct dsi_bridge *dsi_bridge;
473 struct drm_encoder *encoder;
476 dsi_bridge = devm_kzalloc(msm_dsi->dev->dev,
477 sizeof(*dsi_bridge), GFP_KERNEL);
481 dsi_bridge->id = msm_dsi->id;
483 encoder = msm_dsi->encoder;
485 bridge = &dsi_bridge->base;
486 bridge->funcs = &dsi_mgr_bridge_funcs;
488 ret = devm_drm_bridge_add(msm_dsi->dev->dev, bridge);
492 ret = drm_bridge_attach(encoder, bridge, NULL, 0);
496 msm_dsi->bridge = bridge;
501 int msm_dsi_manager_ext_bridge_init(u8 id)
503 struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id);
504 struct drm_device *dev = msm_dsi->dev;
505 struct drm_encoder *encoder;
506 struct drm_bridge *int_bridge, *ext_bridge;
509 int_bridge = msm_dsi->bridge;
510 ext_bridge = devm_drm_of_get_bridge(&msm_dsi->pdev->dev,
511 msm_dsi->pdev->dev.of_node, 1, 0);
512 if (IS_ERR(ext_bridge))
513 return PTR_ERR(ext_bridge);
515 msm_dsi->external_bridge = ext_bridge;
517 encoder = msm_dsi->encoder;
520 * Try first to create the bridge without it creating its own
521 * connector.. currently some bridges support this, and others
522 * do not (and some support both modes)
524 ret = drm_bridge_attach(encoder, ext_bridge, int_bridge,
525 DRM_BRIDGE_ATTACH_NO_CONNECTOR);
526 if (ret == -EINVAL) {
528 * link the internal dsi bridge to the external bridge,
529 * connector is created by the next bridge.
531 ret = drm_bridge_attach(encoder, ext_bridge, int_bridge, 0);
535 struct drm_connector *connector;
537 /* We are in charge of the connector, create one now. */
538 connector = drm_bridge_connector_init(dev, encoder);
539 if (IS_ERR(connector)) {
540 DRM_ERROR("Unable to create bridge connector\n");
541 return PTR_ERR(connector);
544 ret = drm_connector_attach_encoder(connector, encoder);
549 /* The pipeline is ready, ping encoders if necessary */
550 msm_dsi_manager_set_split_display(id);
555 int msm_dsi_manager_cmd_xfer(int id, const struct mipi_dsi_msg *msg)
557 struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id);
558 struct msm_dsi *msm_dsi0 = dsi_mgr_get_dsi(DSI_0);
559 struct mipi_dsi_host *host = msm_dsi->host;
560 bool is_read = (msg->rx_buf && msg->rx_len);
561 bool need_sync = (IS_SYNC_NEEDED() && !is_read);
564 if (!msg->tx_buf || !msg->tx_len)
567 /* In bonded master case, panel requires the same commands sent to
568 * both DSI links. Host issues the command trigger to both links
569 * when DSI_1 calls the cmd transfer function, no matter it happens
570 * before or after DSI_0 cmd transfer.
572 if (need_sync && (id == DSI_0))
573 return is_read ? msg->rx_len : msg->tx_len;
575 if (need_sync && msm_dsi0) {
576 ret = msm_dsi_host_xfer_prepare(msm_dsi0->host, msg);
578 pr_err("%s: failed to prepare non-trigger host, %d\n",
583 ret = msm_dsi_host_xfer_prepare(host, msg);
585 pr_err("%s: failed to prepare host, %d\n", __func__, ret);
589 ret = is_read ? msm_dsi_host_cmd_rx(host, msg) :
590 msm_dsi_host_cmd_tx(host, msg);
592 msm_dsi_host_xfer_restore(host, msg);
595 if (need_sync && msm_dsi0)
596 msm_dsi_host_xfer_restore(msm_dsi0->host, msg);
601 bool msm_dsi_manager_cmd_xfer_trigger(int id, u32 dma_base, u32 len)
603 struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id);
604 struct msm_dsi *msm_dsi0 = dsi_mgr_get_dsi(DSI_0);
605 struct mipi_dsi_host *host = msm_dsi->host;
607 if (IS_SYNC_NEEDED() && (id == DSI_0))
610 if (IS_SYNC_NEEDED() && msm_dsi0)
611 msm_dsi_host_cmd_xfer_commit(msm_dsi0->host, dma_base, len);
613 msm_dsi_host_cmd_xfer_commit(host, dma_base, len);
618 int msm_dsi_manager_register(struct msm_dsi *msm_dsi)
620 struct msm_dsi_manager *msm_dsim = &msm_dsim_glb;
621 int id = msm_dsi->id;
625 pr_err("%s: invalid id %d\n", __func__, id);
629 if (msm_dsim->dsi[id]) {
630 pr_err("%s: dsi%d already registered\n", __func__, id);
634 msm_dsim->dsi[id] = msm_dsi;
636 ret = dsi_mgr_parse_of(msm_dsi->pdev->dev.of_node, id);
638 pr_err("%s: failed to parse OF DSI info\n", __func__);
642 ret = dsi_mgr_setup_components(id);
644 pr_err("%s: failed to register mipi dsi host for DSI %d: %d\n",
652 msm_dsim->dsi[id] = NULL;
656 void msm_dsi_manager_unregister(struct msm_dsi *msm_dsi)
658 struct msm_dsi_manager *msm_dsim = &msm_dsim_glb;
661 msm_dsi_host_unregister(msm_dsi->host);
663 if (msm_dsi->id >= 0)
664 msm_dsim->dsi[msm_dsi->id] = NULL;
667 bool msm_dsi_is_bonded_dsi(struct msm_dsi *msm_dsi)
669 return IS_BONDED_DSI();
672 bool msm_dsi_is_master_dsi(struct msm_dsi *msm_dsi)
674 return IS_MASTER_DSI_LINK(msm_dsi->id);